Percussion-drill



A. L. CHOPIN.

, PERCUSSION DRILL. APPLICATION FILED MAR. 25, 1918.

1 ,330, 1 7 1 Patented Feb. 10, 1920.

2 SHEETS-SHEET l- A. L. CHOPIN.

PERCUSSION DRILL.

APPLICATION FILED MAR. 25. 1918.

Fig.9..

m a b \iwlgw Patented Feb. 10, 1920.

2 SHEETS-SHEET 2- UNITED STA. E

ALBERIC nouisonorr m onpams, FRANCE.

"PERCUSSION-DRILL.

original application filed January 2c, 1917, Seri'alNol 144,733. Divided and this application flled Marches,

1 Specification of Lttei'sTatent.

Patented Feb. 110, .1920.

To all whom itmay concern:

a'citizenofth'e Republic of France, residing at Paris, France, have inventednew and useful Improvements in Percussion-Drills, of I while'the lug 16 has'th'e shape of'a boss to which the following is a specification.

Thisfinvention relate's'to improvements in percussion drills, particularly such as described .in my co pending application Serial No. 144,783, filed January 26, 1917, of which this is a divisional application.

It is the object ofthe'inv'entionto provide a detachable holder for the tool' o'f such drills,

permitting a quick exchange of the tools.

Another object of the invention is to effect improvements in the construction of the drill tool so that water may be injected to lay the dust and clean the hole made by the bit.

WVith these and other objects in view which will be more fully explained in the specification, the tool holder includes certain novel construction, combination and arrangement of parts which will be hereafter described in detail, and specifically pointed out in the claims, reference being had to the accompanying drawings, in which:

Figure 1 is a longitudinal elevation of the di ill with the holder for the tool according to the present invention.

Fig. 2 is a longitudinal section through that part of the drill receiving the tool.

Fig. 3 is a cross-section on line A-B Fig. 2, and

Fig. 4 is a cross-section on line C- D Fig. 2.

Fig. 5 is a detail elevation, showing the lugs of the ring in section and disclosing th engagement of one of the securing rods with such lugs,

To the lower end of a drill 1 with handle 2, body 3 and rods 4 connecting the cover of the drill 1 with the body 3, is secured the holder for the tool 10.. The rods 4 at this end of the drill "form a T-shaped element and each of them engages between stops "Uprovided on a. ring 7 which by,../means of a washer 8 of suitable material positions the sleeve 9 of the tool 10. Said washer cushions the sleeve 9. The said sleeve 9 is provided at its inner end with outer and inner annular grooves 12, 11, respectively, which extend therearound, and prevent idle shocks of the piston from producing a bur on the sleeve whichmight cause the sleeve to jam in the bore of the body.

The holder proper for the tool 10 comprises collar 14 which is madein two parts connected togetherin a diametrical plane which separates the lugs 15 and "16, 'the former of whiehhasthe form of a hook,

form a button witha shoulder.

The inner end portion of the tool is arranged for sliding movement in thes'leeve and is of cross sectionalpolygonal (form,

so that theftool fits loosely 'in "the sleeve.

jSuch construction minimizes friction and A hammer blow in the A material 19 such as leather or rubber, is

inserted into the collar 14 in order to soften the shocks of the shoulder of the tool 10 on the same.

The tool has a shoulder 24 extending therearound at a point between the guiding collar 14 and the ring 7 and also has a bore leading to the outer end ofthe tool. A split collar 27 is arranged around the shoulder of the tool and has its ends connected together by means of a cotter 28. A radial duct 25 extends from the bore of the tool to the face I of the shoulder, and the split collar is formed with means for the attachment of a flexible hose 29 thereto,-to enable a cleaning fluid to be admitted to the bore of the tool.

What I claim is: 1. A drill including a body, a cover there- Q at, fring below the body, two pairs of lugs upon opposite sides thereof, bolts formed with T-shaped heads engaged by said lugs, their opposite ends being secured to the cover, a collar below the ring, a pin extending outwardly from each side of the said collar, and a bent wire extending between the lugs and pin respectively.

, 2. A drill including a body, a cover therefor, a ring below the-body, two pairs of lugs upon opposite sides thereof, bolts formed with T-shaped heads engaged by said lugs,

and having their ends secured to the cover, a collar below such ring, a spllt pm pro]eeting'from said collar, and a bent wire extending between the said tively.'

3. A percussion drill including a sleeve, a

pin and lugs respecring on which the sleeve bears, said ring having two pairs of lugs on opposite sides 1 whereby tion.

. ber upon each side of the ring and collar, having its two ends secured to the lugs of the ring, its lowermost portion engaging the outwardly extending portion of the collar to hold said collar in applied posi- 4. A percussion drill including a sleeve having-inner and outer annular grooves at its inner end, a tool fittln s aid sleeve, a ring around said tool and bearloosely within to secure the ring, a guidin collar for the tool, and means to detacha ly secure said guiding collar to said ring. 7 V

'5. In a percussion drill, the combination of a drill body, a sleeve in the outer end. of.

the body, a ring bearing against the outer end of the sleeve, means to detachably secure the ring in place, a tool having a portion arranged for movement in the sleeve, a collar around the tool, spaced from the ring and comprising a pair of diametrically separable members, and means toconnect the collar to the ring andto hold the collar in place, said connecting "and holding means a lsosecuring the members of the collar to ether. In testimony whereof I aihx my signature in presence of, two; witnesses.

' VALBERIC LOUIS CHOPIN.

' Witnesses; r

CHAS. 'RPREssLY, Jonas HEBERT. V 1,

ing against the outerend of the sleeve,'means V 

